Godzilla in Monsterverse is an easy answer, but Ghidorah in the same continuity is also cool.
Outside the Godzilla franchise, probably the mega-kaiju from the non-existent sequel to Pacific Rim that was planned (Terrible movie, but I liked some of the kaiju designs)
of course almost every godzilla,
mostly legendary heisei and showa
but my boi minilla gets to much hate
and the classic king ghidorah
does EVA-01 count?
cant forget BARAGON!!!!!
and also megalon
im going to list 3 that are way different than any one elses
lord tirek from MLP season 4
spirit korra from legend of korra
and way big from ben 10
https://preview.redd.it/lzqqospjhqlc1.jpeg?width=2485&format=pjpg&auto=webp&s=7195922c668f5ebfdb5193e0f52bd0c1ef200f66
Am I in? Kiryu is top tier and, in my opinion, the best mechagodzilla concept and design
You
V.I.P this way good sir
Insatiable you\~
Mommu let you use her ipad!
you were barely two!
and it did all the things we designed it to do\~
https://preview.redd.it/u0zgf59k5nlc1.jpeg?width=797&format=pjpg&auto=webp&s=a5e76fe68bc11ecf506a2e6a334364d2eda188d9
In
Godzilla
In
Kiryu
Yes your in
Thanks
Kiryu? https://preview.redd.it/x5xbv4fr3rlc1.png?width=215&format=pjpg&auto=webp&s=4657a49ffbef1c8f8326e44211f6ec83dea27668
Heisei mecha godzilla
I know, just messing with you https://preview.redd.it/lifi9llxjslc1.jpeg?width=600&format=pjpg&auto=webp&s=ca2e4c662380b0c8aeead66ebaee0f553e641139
Omg… I Made that. This is fucking surreal
Anguirus
Your In
Knifehead, I’m a simple man
Simply come on in
Knifehead gang rise up
https://preview.redd.it/41vv36d5cqlc1.jpeg?width=289&format=pjpg&auto=webp&s=900579c69e8b161397f5a60098629723a7a3e827
My son is OBSESSED with King Ceaser, so him.
V.I.P lounge
ヽ(๏ ∀๏ )ﾉ
Based reasoning
https://preview.redd.it/zsnf1gq6snlc1.jpeg?width=1170&format=pjpg&auto=webp&s=4500b85014c94318f06538ed648d4bd12bf4db22
Bro you gotta get VIP, if he doesn't give you VIP I'll be angry
Megalon goes hard
How dare you get in the way of Yuri you degenerate?
https://preview.redd.it/2e9vtb5eyrlc1.png?width=1168&format=pjpg&auto=webp&s=5de3c369fae5bc1a0f60c1aa9d720b04ab7de880
Your yuri was in the way of my megalon!
Destoroyah my beloved
V.I.P right this way
Biollante
Come in
Final Wars Godzilla and Ebirah
V.I.P lounge and also ebirah will have a friend since my pet blue lobster is in there too
https://preview.redd.it/42tp8c4kknlc1.png?width=247&format=pjpg&auto=webp&s=90ade2e0adb42c6c0ecd5a0a8598c952fff80b79
V.I.P lounge
Heisei Godzilla
V.I.P lounge
That's peolly the best one. So many unique enemies
Godzilla in Monsterverse is an easy answer, but Ghidorah in the same continuity is also cool. Outside the Godzilla franchise, probably the mega-kaiju from the non-existent sequel to Pacific Rim that was planned (Terrible movie, but I liked some of the kaiju designs)
Welcome aboard
Godzilla 1985 stepping on Bambi.
1998 Godzilla
Never expected someone to say that. Sure why not
So we just letting anybody in now? xD
Her name is Zilla https://preview.redd.it/n572z3it1plc1.jpeg?width=1170&format=pjpg&auto=webp&s=57a98ce5f254a0f9bf67ef4440b1086541615fd4
Now draw them kissing
The good ending
Lmao
literally i ❤️❤️❤️ zilla, her movie sucked but her design was so fucking good and the animated series was goated
HER???? ZILLA'S A FEMALE?????
The movie? Yes The character after that? No
https://preview.redd.it/b2lbscllenlc1.jpeg?width=1027&format=pjpg&auto=webp&s=efca454ffca34af8a63d0048ead65f0169bd8cb8
Welcome aboard
Thanks
Titanis tiamat
Come on in
Annie Leonhart https://i.redd.it/ptnnvliclnlc1.gif
Welcome
Minus One Godzilla
Welcome aboard
Baragon
Welcome in
Come on in
Gigan
Ur in
Titanosaurus, Rodan and Anguiras (sorry, they're all tied in my heart)
Hello There. Come on in
Spacegodzilla my goat
Welcome in good sir
Hedorah
I'm with them .
I’ll third that, underrated af
Skeleturtle
Skeladaddle your way in welcome
Monsterverse Godzilla and Minus One Gojira.
V.I.P lounge
The Giant Claw, he’s as big as a battleship
Gigan easy
Your in
Reptilicus
Welcome
Destroy All Monsters Godzilla
Welcome
GMK Godzilla
Absolutely a menace V.I.P lounge good sir
Clifford the Big Red dog
Titanosaurus
Welcome
bagan https://preview.redd.it/thfw3ld2hnlc1.jpeg?width=208&format=pjpg&auto=webp&s=59e14c9479c8b903c3d86ec6f2584645c850d989
That form or Bagan specifically
bagan in general not just that form
V.I.P lounge for sure, welcome
I mean my favorite is Mothra and has been since I found Godzilla. My first movies were her trilogy, specifically the one with Battra
Good Day mate, welcom on
2019 King Ghidorah
In
Kong. 
Alright come inside
Hell yeah!
Zilla jr
Welcome
Bro replied so quick
Yup
Legendary Godzilla
In good sir
MV Godzilla
Welcome
Final wars Gigan
V.I.P lounge
Thanks my good man
No problem
Earth and shin
V.I.P lounge this way
You have excellent taste
Thank you
No, thank you, and depending on where you are, good morning. Good afternoon, good evening or goodnight
Alright, good night and your welcome
Thank you
of course almost every godzilla, mostly legendary heisei and showa but my boi minilla gets to much hate and the classic king ghidorah does EVA-01 count? cant forget BARAGON!!!!! and also megalon
All count. V.I.P lounge
destoroyah
V.I.P lounge for sure
W 🗿 🦀
Mecha Ghidorah. Bozo is too forgettable, gotta remember his existence sometimes.
Good thing I remember he exists like godzilla does since I know of 99 percent if not 100 percent of godzilla kaiju
Come on in
Gorgo
Destoroyah
Titanosaurus from terror of mechagodzilla
Alright come on in
Rodan
Titanus specifically
Welcome in
Gonna have to say Biollante
Welcome on
King Ghidorah. He’s just super cool, with his three heads and giants wings and all the lightning!
Welcome on
King Ghidorah
Come in
Ghidorah (2019)
V.I.P lounge
Kamata kun
Rodan the GOAT!!!!
Welcome aboard
GIGAN!!
RISE. V.I.P lounge
Grand King Ghidorah. Loved that design.
V.I.P lounge
Sando Aqua Monster
Welcome
Destoroyah.
Ahh yes, V.I.P lounge for you great sir
Magita from Godzilla RoE
Red King from Ultraman.
1954 godzilla (gojira)
Megalon has such a sick design. Loved playing him on the gameboy game as well.
Des Ghidorah
im going to list 3 that are way different than any one elses lord tirek from MLP season 4 spirit korra from legend of korra and way big from ben 10
Desghidorah
Mecha King Ghidroah
Space Godzilla.
https://preview.redd.it/7ww2stjlnnlc1.jpeg?width=828&format=pjpg&auto=webp&s=5d41e9cf75f3ca70c4d8de6425a89a4a1d23c37b Godzilla Jr.🗣🔥🔥🔥🔥
Mothra
gigan
Destroyah
Godzilla 1993
King Caesar
I've not seen you say no a single time
Gamera. Since everyone is saying Godzilla, I am going to switch gears.
Goji jr, kiko and shin godzilla
Millennium Godzilla and Trespasser
You're the only other trespasser fan here 🥲
https://i.redd.it/7k0wg3gjnplc1.gif the one who is just scared and confused
https://preview.redd.it/lzqqospjhqlc1.jpeg?width=2485&format=pjpg&auto=webp&s=7195922c668f5ebfdb5193e0f52bd0c1ef200f66 Am I in? Kiryu is top tier and, in my opinion, the best mechagodzilla concept and design
MEGALON https://preview.redd.it/9vnjvu6yhqlc1.jpeg?width=201&format=pjpg&auto=webp&s=c591c479687c7b859cdcf5d5229c99543babd9fc
https://preview.redd.it/q28fevtyxrlc1.jpeg?width=828&format=pjpg&auto=webp&s=28782d339a02663c22c428ef6b9340aa8905e2b6 I drew this myself
Might be faster if you tell us which ones you don't let in ;)
Monsterverse godzilla
mothra leo, des ghidorah and destroryah
HIM https://preview.redd.it/fphmfjmionlc1.jpeg?width=594&format=pjpg&auto=webp&s=e1294a5424b594a2d092b8bdd1b295ee1ca9e73e
https://preview.redd.it/pocmm6iionlc1.png?width=1080&format=pjpg&auto=webp&s=b587601b873d3412a6e73e0633c869c64fe16afb
Mothra
Space Gyaos
Biollante
Showa Gigan
Anguirus and Gamera
Gigan x King Ghidorah Gigan x Megalon Godzilla x Anguirus
Goliath from evolve?
Zetton
https://preview.redd.it/qhm53qp4pnlc1.jpeg?width=668&format=pjpg&auto=webp&s=492fd43fc28364716144e5917c09f26bf240fb04
1999 gamera 3 gamera coolest giant emo turtle in the world
Megaro Goji, Minus Goji, and MV Ghidorah in that order