All of them were made by me except for Magma Man which was made by Hamster Man and the Megas which were made by mr. MMA himself. Anyway, here are some links:
Hamster man's YT channel:
   / @hamsterman7895  
MMA discord:
  / discord  
MMA website:
https://www.megamanarena.com/
MMA YT:
   / @megamanarena8248