You have to catch a kingler on lapras beach near cocona village on renbow island
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it it ratticate
Some where in the deep wood, you have to use a cut pokemon, to cut a big bush blocking you from entering, then he is in a small cave by itself
Capture Gallade in the Altru Tower after you defeat it as a boss.
Venusaur is found in Lyra Forest. You'll need a Pokemon with a CUT X1 ability. Make your way to the section with the Hoppips and Beautifly. There is a bush there - cut it, and Venusaur is waiting inside.
You need 3 cut eg Umbreon, Fearow, Syther etc.