I fear there's some inconsistency in the way we handle some closely related Pokémon games:
RS and Emerald
> pokemon_rse lumps them all together.
> There are haruka_(pokemon_emerald) and yuuki_(pokemon_emerald) for Emerald.
> There are no equivalent tags for RS. No such thing as say, haruka_(pokemon_rs) and yuuki_(pokemon_rs).
DP and Platinum
> pokemon_dppt lumps them all together.
> There's no obvious way to distinguish those. You are out of luck if you want to see say, only Platinum posts.
> Case in point: post #655882 is both versions of Hikari.
BW and BW2
> pokemon_bw and pokemon_bw2 are separate.
> We seem to have an unspoken rule that bw is the default tag, we basically use bw2 for whatever can't be found in bw in the first place. For example, Fuuro appears in both BW and BW2 with the same look. Almost all posts with her are tagged pokemon_bw, not pokemon_bw2.
SM and USUM
> pokemon_sm and pokemon_usum are separate.
> We seem to have the same unspoken rule as above. For example, Suiren appears in both SM and USUM with the same look. Almost all posts with her are tagged pokemon_sm, not pokemon_usum (not counting anime posts).
If possible, I'd like all these items (RS/E; DP/Pt; BW/BW2; SM/USUM) to work in the same way. For tagging purposes, it seems important that all of these pairs have some character and design differences while they share a lot of characters and designs.
For this reason, I suggest splitting these tags:
> delete pokemon_rse, use pokemon_rs and pokemon_emerald (or pokemon_e?)
> delete pokemon_dppt, use pokemon_dp and pokemon_platinum (or pokemon_pt?)
We may then delete haruka_(pokemon_emerald) and yuuki_(pokemon_emerald) as unneded.
(To put it another way, if we really wanted to keep pokemon_rse and pokemon_dppt together this way, then a case could be made that pokemon_bw and pokemon_bw2 should be merged into a single tag and that pokemon_sm and pokemon_usum should be merged into a single tag too.)
By the way, my opinion about pokemon_rgby and pokemon_gsc is this: based on the current posts, these two tags look fine and may be kept unchanged. Splitting then into RG/B/Y and between GS/C would not be a great help in finding posts with different characters or designs. For example, a separate tag pokemon_crystal is unneeded, because it would basically just serve the purpose of finding posts with the female protagonist Crystal and/or the NPC Minaki (Eusine).
Any thoughts?
Updated