>>49066870Part of it is likely Japan's weird copyright laws, but most of it is main series refusing to acknowledge any spin-off the games aren't directly compatible with and the darker nature of these games makes them less "on brand" so from a corporate standpoint they'd rather it be forgotten. The fact that 2 bombs go off in Colosseum one of which is set off by the player character and the other in their vicinity by one of the bad guys and ho-oh blasts Evice's getaway helicopter are probably enough to warrant an e10+ rating or equivalent in many countries for Colosseum these days if they were to rerelease it, and XD ends with Ardos trying to convince Greevil to escape and blow the place up with Eldes actually acknowledging that many people would die if they did that, which is a lot more than modern pokemon is willing to tackle despite every game's plot since gen 3 being some variation of "a crazy person wants to destroy the world with legendary pokemon for their own gain" which is just as bad but glosses over any potential harm to people and the villains all feel like a joke so it gets the same kind of pass that Disney movies get.