>>57221870Rare Pokémon are cool, but Johto has a ton of Pokémon that are unreasonable even if you know exactly where to look for them.
Last time I played Crystal I wanted to use Teddiursa, which you can technically get before the first Gym, but it's exclusive to Dark Cave at a 5% encounter rate only in the Morning (4AM-10AM) AND if you do find one it has a 50% chance to fucking flee the battle like you're in the Safari Zone. You have a roughly 1/6 chance to catch one at full HP, they're only found at Level 2 so if you try to weaken it you're likely to accidentally kill it, and again it can just end the battle on a coin flip every turn and you have to hit the 1/20 chance to find it again in your limited window of time each day.
There are also Phanpy on Route 46, which have exactly the same encounter and catch rates as Teddiursa. Both of these Pokémon are also fucking terrible, with barren movepools and late evolutions (by Johto standards), completely outclassed by the Geodudes you can find both locations at 10x the encounter rate with no bullshit and a type advantage against the first three Gyms. Even if you know they're there, why go through the trouble of seeking them out?
At least their evolved forms are available much more commonly later, so you don't have to put yourself through this. But they're not available until after Claire's Gym, so you miss the entire experience of going through Johto with them, and at Level ~30 you have a lot of work to do if you want to use them for the Elite Four.
Johto is full of Pokémon like this (some of them aren't even in Johto), many Johtomons are both more rare and harder to use than Kanto mons, if you even have the option to use them at all.