Why can't a Happiny learn Strength ?

Question

i mean Brock's Happiny is able to move boulders and other heavy stuff.

Answer 1

Because how GameFreak wanted it.
>In the anime, Happiny are shown to be extremely strong. Brock's has been seen lifting very heavy things above her head. Additionally, Happiny's Field Move in Pokémon Ranger: Shadows of Almia, Crush, may also link to this.

The anime and the games are 2 separate things.

Comments

hahah.. thanks

Answer 2

Happiny doesn't even look like strong Pokemon so maybe that's why Game Freak wanted that Happiny can't learn Strenght.