hmmm..... i dunno... maybe not MOST powerful, but RYOKO! Just thinks:
U can dodge by teleporting, attack with energy swords and blasts, u can fly, multiply yourself AND When your body becomes fully mature and you've got all 3 gems, you'll be as strong a a Godess of the UNIVERSE! and thats pretty strong ✅
I think Doraemon is one of the powerful anime characters around...
He has many powerful gadgets like a time stopping thing that stops the time and do anything he wish.
He has a 'Wherever Door' where he can go anywhere he wish. He can fly as well with this little copter thingy and has a gadget that creates force field to protect him from danger.
He have this 'what if' phone booth where a person dials it and propose a what if scenario which changes the world like "what if mirror never existed". In other words he can say what if DBZ, mokono, vash, Akira or whatever is nothing more than a human being or worse, never existed.
Apart from that he can turn almost anything into small things with a torch light and has other cool stuffs like miniature spy satellites, cloning device, etc.
He can travel through his time machine and kill any normal anime character when they were baby with god knows what weapons he have in his 4D pocket.
However he is kinda weak as he depends on his gadgets... and scared of rats.