probably no Pokemon can be said most powerful as they get tougher with training as in case of charizard where it was first beaten by blazigen and in battle frontier it defeated articuno same is with every Pokemon so level them high make them learn new powerful moves and they will get more powerful
Arceus
Mew
NO. Only ash got that as a choice. You have to catch it in the viridian forest, but it's rare
It depends if the memory from the caster is happy enough.
Pikachu
The most powerful water type is Suicune.
According to the base stats 'ARCEUS' has the highest stats all up.
No mewtwo is stronger than mew they built him to me smarter and more powerful than mew.....it shows the scientist in the movie
The most powerful bomb ever made was the tsar bomb.
Arceus
It is an egg, that when hatched, the most powerful Pokemon ever comes out. Arceus. I'm not sure how you got the Arceus Egg because Arceus is a legendary Pokemon.
Caterpie
Arceus is the most powerful, with a base stat total of 720, the current highest. sds ooo
dragonite
Arceus
mewtwo
Mew