Ruling shaymin+dawn stadium

[fc4]

If I use shaymin's seed flare to attach 3 grass energy to a {G} pokemon with dawn stadium in play, can I have 3 damage counters removed?

 

[Khalddrogo]

Yes, since it says "When ever".

 

[Chairman Kaga]

No. The attachments all occur within a single action, so only one attachment event is created. Dawn Stadium only triggers once in this case.

Q. If I use Blastoise's "Waterlog" Poke-POWER to attach a bunch of Basic Water Energy cards, how many damage counters do I get to remove if Dawn Stadium is in play?
A. You only get to remove one damage counter in this scenario. Waterlog consists of a single action and therefore only gets to remove one damage counter for the whole Poke-POWER. On the other hand, powers like Rain Dance or Energy Rain say "as often as you like during your turn", meaning that each energy attached that way is separate and would trigger Dawn Stadium multiple times if they were used more than once during the turn. (May 29, 2008 PUI Rules Team)

Waterlog does the same thing for {W} Energy as Shaymin does for {G}, so the same ruling applies here.