Karrablast's & Shelmet's "Mysterious Evolution" attacks say "if Shelmet/Karrablast is in play, search your deck...". Does this mean that Shelmet/Karrablast can be in play on either player's side, or does it have to be in play on the side of the attacking player?
Mysterious Evolution will work if either player has the corresponding Shelmet/Karrablast in play.
Source: TPCi Rules Team (2011-12-01)

Relevant cards

Note: All applicable cards may not be listed below.
BW3_11
BW3_8