Well, my strongest OC so far is GodCat (basically a white StickCat that has a Halo and Angel wings, but they have another form where their halo is black and broken and has either black angel wings or demon wings.), since they are from heaven, meaning they can make anything happen, and they are immortal, the people who are strong as them are AngelBunny, HellBunny, Fallen AngelBunny and SkullBunny.
Bloo and StickCat are actually less powerful than GodCat, despite Bloo being immortal, they are powerful due to the giant pencil they hold, so they’re not physically strong, they can still feel pain and break any part of their body.
StickCat basically has the same reason as Bloo, except he’s not immortal, he can still be revived somehow whenever someone makes a weird ritual by drawing him on a piece of paper and then placing it on a paw shaped pentagram.
And the shapes? They’re immortal as well, but they still can’t destroy GodCat since they’re just creations by M.S. (named after MS paint.) who is more powerful than them, and I know I said they’re immortal, but they can still feel pain, and basically one time one of them went insane and turned into a monster, getting their consciousness removed, and then when they got killed by “a tank” (I’m looking at you, ya pink circle.) their consciousness faded away, thus they became a zombie until they randomly turned back to normal.