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Heracross
A handy little guy to have on your team. You can get it pretty early in the game and has a pretty diverse learnset
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Beedrill
Again, easy to access but slightly less viable. Learnset is pretty limited.
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Pinsir
Powerful and a good niche on the team. But extremely hard to get your hands on one.
Heracross@Salac Berry
-MegaHorn
-Close Combat/Brick Break
-Rock Slide/ Stone Edge/Aerial Ace
-Strength/Night Slash/Bulk Up
Beedrill@Focus Sash/Salac Berry
-Poison Jab
-Assurance
-X-Scissor/U-Turn
-Swords Dance
Pinsir@ Zoom Lense/Life Orb
-X-Scissor
-Swords Dance
-Earthquake
-Stone Edge/Rock Slide