But those are... new to the last generation... Like I don't even know those. Hmph. So Spinda is the only Pokemon with pattern/palette variants before the last generation? Unknown were shape variants, which is not what I was thinking of... I was sure there was at least one other Pokemon from earlier generations which had such differences between each other.
By the way, was it ever explained by Secret Bases didn't continue into more recent generations? I actually enjoyed finding little secret places, fixing them up, setting up a room. It'd have to have been unpopular for some reason, but why? Or did they just find it a waste of coding?
I dont think any other pokemon have had colour changes quite like flabebe before.
There were differences available in some pokemon from Gen 3 onwards.
Spinda obviously had a large range of spot patterns available. Then there are also pokemon with region specific colourations. Shellos and its evo were either pink or blue depending on where they were caught, and Basculin come in red or blue eyed variants. Colour based gender differences have existed as well, as mentioned above in the form of Hippowdon (although I think they did also have some shape differences too).
But flabebe is the first pokemon to have such a wide range of colour changes, and are the first to be based on the specific tile theyre in rather than in-game location, gender or international region.
I dont know what the specific reasons were for removing hidden bases, but it was probably to do with wanting to focus development on other locations.
As I recall the Hidden Bases in Gen 3 required you to cable-link to share them with others (if it was even possible to have friends play in them) and that didnt make it an easy feature to share.
In gen 4 it was better in the Sinnoh underground, but it only worked through local console-to-console wireless connection, which made it limited when you didnt have other friends nearby with the game.
They could have reimplemented it in Gen 5 but it would face the same issues as Gen 4 being on the DS system, which didn't have great online access/play.
They couldve brought it back for Gen 6 as online play is much better on the 3DS, but the logistics of fitting it in might have made it difficult, and working out how best to make it online may have been an issue. It's also just arguably not worth their time to try programming it in. It was nice, but perhaps there's not much call for it.