TM Hyper Beam
TM Psychic
TM Solerbeam
TM Shadow Ball
the best moves he can learn is hyper beam,fissure,earthquake,facade or hydro cannon (i think)
The best fire type Pokemon in Emerald Version is likely Camerupt(evolves from numel).Camerupt has very high defense and attack stats,at the cost of its speed. It can learn many powerful moves such as Earthquake,Flamethrower,Fire Blast,Overheart,Lava Plume,etc.
It doesn't learn moves you need to teach pikachu the best moves (thunderbolt,thunder,slam,quick attack) Then evolve pikachu into raichu.
It depends on the level, its moves and its stats. But if even, it'll be Giratina
The best is earthquake by TM
its best one is hydro pump
His best moves are leaf storm frenzy plant giga drain leaf blade in my opinion
it can learn a range of different moves it's best one is hydro pump and to evolve it into a ludiclolo you will need a water stone.
His best move is Seed Flare, but there are others.
A Bannette with Faint Attack, Spite, Curse and Destiny Bond.
overheat it is you find on lavaridge town in the gym once you have completed it ...
Hey man just make it learn the moves you want it to know.