>>18741050They've been pretty obscure in all of the games. Red and Blue you could only get them in the grass on the route below Pallet Town (or trade for one at Cinnabar), in Yellow it was a rare as hell Safari mon only, in GSC it was on the route right before Ice Path and Route 28, It was a Great Marsh Pokemon in Platinum, it was near the Giant Chasm in Gen 5, and it's a Friend Safari Pokemon in XY. It's very much a blink and you miss it Pokemon.
Part of the reason I like it though is that there used to be rumors that there was a powerful Pokemon in the grass below Pallet, so when I got Surf, I flew back to Pallet and hunted around. I was initially disappointed that it was just a Tangela, but the little guy kinda grew on me.