>>12720076It wouldn't take 10 minutes to write code that translated 0-15 IVs to 0-31 IVs and wiped the old EV system from a Pokemon (Box glitch existed in RSE, possibly purposely so EVs on level 100s were not an issue).
The issue was more on the level of communications between the generations of carts (not impossible to solve, just convoluted), but the most difficult checks were involving glitches. Glitches in GRBY/GSC were notorious for their potential for large scale corruption of carts, and abusing these would let people port up any glitches that went under the radar to be filtered out during a trade check to newer games, making them once again a glitchy mess.
The older games were, in all likelyhood, removed from compatibility because they were done with the idea of people porting their cherished Missingno. to Gen III and beyond.
Gen V isn't some glitchy mess, and with the roundtable, we already know that porting Gen V to Gen VI is confirmed. This thread is pointless.