There's a lot of fun stuff that was cut, even outside of the Gen 1 and 2 stuff we've known about for years at this point and are mostly discussed to death (although I will keep noting the neat fact that Gen 1 originally had Fire/Ice/Thunder stats instead of Speicial, as noted in Blue's source/Temp/common.dmg). Gen 5 had some cut Game Sync concepts that were probably genuinely impossible to make work on the DSi (they tried to let you upload MP3s or some shit, that's wild), SS has some slots that appear to be saved for the minor league gym leaders that they never got around to using, and of course XY's entire post-game being cut for a third version that never happened.
>>57784696It had the same slot as Tympole while co-existing with the Oshawott line all the way back in October 2009, I don't understand where the fuck you're getting this information. Furthermore, the design stuck around until like December of the same year despite the Tympole line being added, so it was good enough to be in the running but was probably cut for type diversity reasons as Gen 5 is when Game Freak got extra fastidious about that sort of thing. Although everybody speculating it's too close to another design of a water type is also probably correct as there is a lot of overlap there too. Really it's just the wrong game for it.