Knock Out!! is a puzzle game released in March 1982 for arcade and Commodore 16 systems. The recent coverage mentioning the game appears to reference a Pokémon trading card product rather than the original arcade title itself, suggesting minimal current activity around the classic puzzle game. No substantive updates or community discussion of Knock Out!! proper are evident in available coverage.
via IGN
The Pokémon TCG: 30th Celebration Knock Out Collection is available at Amazon for $48.42. Get details on stock updates and other rare 30th anniversary booster restocks.