UPNetwork -> Pokédex -> Generation 3 -> Abilities

Pickup - Sometimes picks up items.

Items that can be found:
Super Potion (30%)
Ultra Ball (10%)
Full Restore (10%)
Full Heal (10%)
Revive (10%)
Rare Candy (10%)
Nugget (10%)
Protein (5%)
PP Up (4%)
King's Rock (1%)

012 - Zigzagoon - Normal

013 - Linoone - Normal

165 - Phanpy - Ground

335 - Aipom - Normal

358 - Teddiursa - Normal