Ok, got a few more.
Goodra Crest: Gains water type. Sets up rain upon being sent out. Boosts special moves in rain by 33%
Floatzel Crest: Attack is boosted by 15%. When in rain, all special moves become physical.
Samurott Crest: Uses swords dance upon being sent out, if its in its moveset. Sword/slash/cut moves do 20% more damage. If it lands a super-effective move, the opponent gets one random stat lowered. If it lands a not-very-effective move, its gets one of its stats lowered. If it gets a crit, regardless of effectiveness, the oppnent's defence gets lowered.
Stoutland Crest: Us