>>48662717I personally think Gold is the best of gen 2, for a few reasons.
1) in crystal you catch ho-oh and lugia at higher levels than in g&s so neither of them have their signature moves, and gen 2 does not have a move relearner.
2) gold has the best exclusives of the 3 games in my opinion.
3) gold and silver have different sprites for every pokemon, and crystal uses a combination of both (mostly silver sprites), but I prefer the gold sprites for 99% of pokemon.
4) gold is the only game where you get the item sacred ash before the elite 4, which is literally the only time in the game where you would ever use it.
5) crystal forces you into cutscenes with suicune and steers you into the plot way more than the other games (not as bad as newer gens obviously).
The 3 games aren't that different so which game you prefer mostly comes down to small nitpicks like these.