buy pokemon 151 japanese booster box sv2a featuring the return of Kadabra after an epic 20+ year hiatus Pokemon 151 Japanese Booster Box

One of the main reasons behind their weakness has to be the extensive space they demand in decks since they mostly use energies belonging to other archetypes as there is no specific energy card dedicated to this particular type

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Last but not least they also got the strongest Fusion Monster: Metalfoes Mithrilium

Evolution Sage isn't the most potent proliferater, but it's a must-have for a green deck looking to use the keyword

If A Legendary Ocean gets banished, it is hard for Umi Control to bounce back

Thats an intensely powerful ability, especially combined with everything else on this list