The move Slam is in the Physical Attack type category which means it's power is determined by your Pokemon's Attack Stat points and Pikachu happens to have the move Special Attack Stat points and Speed Stat points then Attack stat points which means teaching this move would not be recommended. However teaching it a set damage move such as Seismoc Toss which is a Fighting Type move unaffected by type match up's except Ghost, this move is able to inflict damage based on Pikachu's Level so if it's Level 70 it will inflict 70 damage points and etc. If you evolve Pikachu to Raichu you will notice its Attack stat increases by a pretty good margin and having a damage inflicting move such as Slam would be more recommended for Raichu.
Pikachu learns slam at level 21.
pshycic,surf,confuse ray,and body slam
Pikachu learns body slam not by level but by move tutor.
On four island, there is a house next to the daycare center. Inside there are two guys next to eachother. One of them will teach a pokemon of yours the move Body Slam.
body slam is.
Near 21 level. I have Pikachu of 21 level and it has recently learnt slam.
Pikachu learns slam at level 21.
pshycic,surf,confuse ray,and body slam
Pikachu learns body slam not by level but by move tutor.
On four island, there is a house next to the daycare center. Inside there are two guys next to eachother. One of them will teach a pokemon of yours the move Body Slam.
body slam is.
It doesn't learn moves you need to teach pikachu the best moves (thunderbolt,thunder,slam,quick attack) Then evolve pikachu into raichu.
leveling up: thundershock growl tail whip thunder wave quick attack double team slam thunderbolt agility thunder light screen
A pikachu can learn thundershock, growl,thunderwave, tail whip, quick attack, double team, slam, thunderbolt, agility, thunder, and light screen by itself.
sometimes
Body Slam isn't a TM in the game. Some Pokemon can learn the move naturally through level up, though.
By my opinion, no. Shellos is not a good Pokemon. Why is that? Because you catch it in very low levels, can be beat by ALL Grass-Type Pokemon and because it learns really bad moves (except Muddy Water and Body Slam). Hope I helped :)