Changes

Also, if you want Gaia Plate the Earth Giant on the field, it is best to have at least three [[Rock]]-[[Type]] monsters. You can then halve the attack of your opponents monsters, leaving them open for weak Koa'ki Meiru monsters such as [[Koa'ki Meiru Boulder]] on the field.

Because [[Iron Core of Koa'ki Meiru]] may often be in the graveyard, it is vulnerable to cards that can remove it from play, such as [[Gladiator Beast Retiari]], and [[Macro Cosmos]]. Also, having multiple Koa'ki Meiru monsters on the field at once can be extremely dangerous, as each one would require you to reveal or discard a card from your hand at the End Phase; leaving hand and field advantage very hard to maintain, unless multiple copies are used (for example, 3 Koa'ki Meiru Powerhands only require 1 Normal Trap Card revealed). Koa'ki Meirus are very reliant on the hand and so cards like [[Card Destruction]], [[Mind Crush]] or [[D.D. Designator]] can completely disrupt the player's strategy, and cards like [[Trap Dustshoot]] or even [[Des Koala]] deal serious damage.