Question

If I defeat a high level Pokemon that gives speed EVs, would a level 1 Pokemon with Exp. Share get lots of Speed EVs?

Comments

A pokemon's level has nothing to do with the amount of EVs a Pokemon gives after battle

Answer 1

No

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Each Pokemon give out a set amount of EVs when they faint regardless of the level of the Pokemon that gain experience when it is defeated.

Comments

Does that mean that if it is the same level as the rest of my team, that it's basically weaker, because it has less EV's?

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No. Let's use an example.
Magikarp gives out 1 Speed EV on defeat.
The Pokemon that participated in the battle/have EXP Share each get 1 Speed EV, and that's it for that Pokemon.