a fun imagining of Bowser in SRB2, though a couple of things felt a bit weird for me:
his max runspeed is suuuper fast. bows is this large, typically heavyweight class character. running normally with him almost feels like you're gliding. i can understand why he might need to be this fast (to compete with other characters' ability to traverse the map, maybe?), but it takes away a lot of the oomf for me, personally.
also, though this may have required some extra lua to smooth over, the voice clips for jump and special abilities get repetitive fast. im not sure if there's sfx cycling or alternating clips that could have been used (at least for jump), but it could be worth looking into for later.
overall, very good. it's surprising how well these sprites fit in the game, lol