Despite being an aggro fan, I've rarely found a deck that's wanted Akroma's WillAkroma's Will, so I feel like I'm a half dozen years behind asking if this is too powerful
There are plenty of other cards to add to the janky fun

Other printings of Pupitar $21.98 Pupitar Aquapolis $0.27 Pupitar Scarlet & Violet Black Star Promos $2.41 Pupitar Neo Discovery $1.79 Pupitar Expedition Base Set $0.37 Pupitar HSUnleashed $0.45 Pupitar HSUnleashed $0.35 Pupitar Stormfront $0.34 Pupitar Mysterious Treasures Most valuable cards in POP Series 1 View the full price guide $40.73 Tyranitar ex POP Series 1 $21.25 Rayquaza POP Series 1 $17.84 Armaldo ex POP Series 1 $12.89 Swampert POP Series 1 $10.36 Sceptile POP Series 1 $7.93 Blaziken POP Series 1 $6.35 Torkoal POP Series 1 $6.04 Murkrow POP Series 1 More cards by Hisao Nakamura $180.99 Scizor Aquapolis $70.33 Scizor Aquapolis $51.11 Gyarados Deoxys $38.09 Typhlosion Dragon Frontiers $36.26 Metagross Deoxys $32.76 Nidoking FireRed & LeafGreen $17.79 Aggron Legend Maker $17.38 Seel Skyridge Discover Keep browsing Fighting typeFighting type Pokmon cards SetPOP Series 1 Most valuableTop 100 Pokmon cards You might also like...

All of that is great, but back then there were answer cards like Swords to Plowshares that could render that moot and stick you with a rather annoying bill
Thanks to the folks at RK9, an online tournament software company, were able to see a breakdown of what the most popular decks were at EUIC: Lost Zone Toolbox - 308 players (20.3%) Lugia VSTAR/Archeops SIT - 274 players (18.1%) Gardevoir ex - 179 players (11.8%) Mew VMAX - 176 players (11.6%) Giratina VSTAR - 134 players (8.8%) Hisuian Goodra VSTAR - 117 players (7.7%) Other - 329 players (21.7%) With 1,517 players, EUIC was the second-largest Pokmon TCG event ever seen outside of Japan