Maybe this shows up in some fringe situations with death triggers or in strange attrition matchups, but I dont anticipate it being particularly good
If we ever got another Team Rockets Charizard or something like that in a modern set, the outcry would be truly insane.
In the early game, focus on using cards like "OP09-095 Laffitte" that dont have [On Play] effects, while gathering essential cards that reduce costs or provide K.O
Being able to stack your hand with your best equip options and then boost all your creatures as a side-effect of stacking them on Kellen makes this card an auto-include for any red/white deck with an equip focus
Pokemon licensing flow chart from Pokemon Story (2000, Kubo) image640333 52.5 KB Translated portion relating to Pokemon cards image358383 50.4 KB Test Cards image1920413 137 KB Link to Test Card sub-thread: Test Cards 1996 January Tetsuya Iwasaki Tetsuya Iwasaki was in charge of New Business and Product Development at Star Corporation, which later handled the initial distribution of the Pokemon Card Game in 1996
Minamo, School at Waters Edge comes into play untapped