Wild Pokemon Items
I've organized a list of items you can steal from wild Pokemon with Thief or Knock Off
Shards:
Blue Shard- Clamperl (1/48, give or take)
Yellow Shard- Chinchou (very rare)
Green Shard- Relicanth (rare)
Red Shard- Corsola (rare)
Other:
Heart Scale- Luvdisc (uncommon)
Dragon Scale- Horsea (rare), Bagon (rare/very rare)
Rawst Berry- Numel, Vulpix (sometimes)
Sun Stone- Solrock (rare/sometimes)
Moon Stone- Lunatone (rare/sometimes)(Lunatone are not found in Ruby)
Locations of above Pokemon:
Clamperl,Relicanth,Chinchou: all three are found outside the underwater entrance of Sootopolis
Corsola,Luvdisc: top of waterfall by Evergrande PokeCenter (fish)
Horsea: route with strong current west of Pacifidlog (fish with Good Rod)
Bagon, Solrock: Meteor Falls
Numel: Fiery Path and grass near it's ends (i think there's more)
Vulpix: Mt.Pyre (outside)
We have more cheats and tips for this game here, Pokemon Ruby cheats
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