Which underused type combinations should have more Pokemon?

[guzmania]

i stand by my previous statement of an ice/poison mon being absolutely necessary
but i would like to add the following to my pool of absolutely necessary type combinations for upcoming gens:

• dragon/bug (and it's nuts to me that we don't already have one)
• dragon/fairy (STILL nuts. no mega altaria doesn't count i want a dragon/fairy mon that isn't reliant on a generational gimmick to even exist please)
• ground/fairy (certainly i am not weird for thinking this actually has serious potential)
• fire/fairy (sheeer beat me to it but nah, i feel like this should've been a thing by now)

as for ones i would really enjoy seeing more of

• electric/ghost (how is base rotom the only one of this??)
• ghost/poison (once again, how is the gengar line the only one lol)
• steel/ice (deserves to belong to a mon besides a regional form)
• ice/fairy (read above)
• ice/ghost (can you guess what type i just want to see a bit more of in general)
• fairy/flying (seriously i feel like this shouldn't be as rare as it is)
• pure flying (THIS DEFINITELY SHOULDN'T BE AS RARE AS IT IS)
• psychic/dragon (i feel like this would make for a badass pseudolegendary)
• fire/electric (this belongs on a starter. i will get a job at game freak and make it a starter)

i rest my case

 

[Camille]

Water/Fire - Volcanion is very disappointing for a Mythical, as it is ugly, has no backstory whatsoever, and can't learn Surf nor Waterfall for some reason. I'd like the next pseudo-legendary to not be a Dragon-type and have this typing instead.
Normal/Ground - never liked Diggersby, and Ursaluna isn't that amazing, either, regardless of the form.
Poison/Steel - Revavroom is so ugly and boring.
Bug/Psychic - really dislike both Rabsca and Orbeetle design-wise.
Bug/Dark - Lokix isn't as bad as the two Bug/Psychic-types, but still leaves much to be desired.
Normal/Poison - Grafaiai is ugly and creepy, and I even prefer Shroodle.
Ice/Fighting - Crabominable is so hideous and doesn't get Ice Shard nor Mach Punch to make up for its poor Speed.
Grass/Fairy - dislike all Pokemon with this typing design-wise, especially Shiinotic and Tapu Bulu.
Dark/Fairy - the Impidimp line is disappointing for me.

 

[Railgun]

Steel/Dragon! All we have so far are Duraludon and Dialga. We need more!

Fairy/Dragon as well. Not much for that aside from... Mega Altaria?

Steel/Ghost is also lacking. I don't think I've seen Normal/Steel either.

 

[p0pp1i0D3f3nd3r]

That's Easy;

Bug/Dragon;

why haven't they made at least ONE Bug/Dragon Type Pokemon yet?!! That's literally the ONE type Combination of Pokemon I want more than any others!!

Seriously; why have they gone 9 WHOLE GENERATIONS with No Bug/Dragon type Pokemon?!!

 

[Greninjaman]

We need more Ground/Fighting types (or Fighting/Ground Types). Both types are tied for the most amount of types they are super effective against with 5 each. As such, Great Tusk is strong against 8 types (This is due to Fighting and Ground being good against Rock and Steel).