Try Serebii.net, it has a pokedex with every move a pokemon can learn.
I use it all the time for this sort of stuff.
it can learn Grass and Psychic moves
Level 18
Of course it can learn dragon moves such as dragonbreath and dragon dance and also can learn moves like twister and waterfall.
No.Magikarp cannot learn any TM moves if it evolves into gyarados then gyarados can learn TM moves and HM moves too. I Hope i helped you!
Poochyena evolves into Mightyena at level 18.
No Pokemon can learn more than four moves.
Magikarp can't learn any TM moves.
Alakazam cannot learn any HM moves.
normally medicham learn normal pchychic and fighting moves
marshtomp learns good moves in level 16 he learns mud shot but u have to train so it could learn good moves or just maake him learn moves by tm.
no, arceus is a Pokemon that can learn a lot of moves, he can even learn fly but there are many moves that he cannot learn. the only Pokemon that can learn all moves is mew...
He can learn many but he can learn moves like giga impact and hyper beam when he evolves. So if you want good moves evolve him!