Here are all the type combos I'd like to see in the future:
Bug/Dark
This I want to see too.
Bug/Dragon
Mega Flygon pls
Bug/Ice
This as well; like a frosty Volcarona or something.
Bug/Psychic
Surprised we don't have this; it would be super cool.
Dark/Electric
This is one of the most heinous missed typings to me. Dark Electric would be real awesome. C'mon Mega Luxray.
Dragon/Fighting
Forget the 4x Fairy weakness, this'd be great offensively.
Dragon/Grass (Mega Sceptile Doesn't Really Count to Me Because It's Only a Mega Evolution)
I know what you're saying. It would be nice outside a mega.
Electric/Fighting
Electivire could've almost filled this.
Electric/Poison
Offensive and Defensive presence, nice.
Electric/Psychic
This would be pretty crazy, the movepool would be awesome.
Electric/Rock
With levitate? :D
Electric/Grass
We do need one outside Mow Rotom.
Electric/Flying (Zapdos is the only one with this typing)
This; weee actually do have outside Zapdos already. Fan Rotom (which I wouldn't really count -) but also Emolga.
Electric/Ice
Wouldn't really count Frost Rotom.
Electric/Fire
Wouldn't really count Heat Rotom. :I
Fighting/Ghost
This is another great offensive / defensive mix I think.
Figghting/Ground
I REALLY wish we had this for my Prism League team. It would be amazing offensively.
Fighting/Ice
Hadn't thought of this, liked someone elses viking idea.
Fire/Grass (Could be a plant with leaves resembling flames with a warm color palette)
Possibly my most wanted typing. The two cover so many weaknesses of each other!
Fire/Ice
The IcyHot pokemon. lol but it would be great I think.
Fire/Normal
Weeee actually have one of these, a pretty good one too.
Ghost/Steel
Aegislash... but forget him, I'd like a normal one.
Ghost/Psychic
Hoopa; but event legend. Bleh.
Ghost/Normal
Wish this could exist :I
Ice/Dark (Though this is already used, I'd like to see another besides Weavile)
I can agree; Ice / Dark seems like it could have more than just weavile / sneasel.
Ice/Poison
My favorite along with Fire/Grass. Offensive and defensive mix again.
Ice/Rock
We do have amaura / aurorus. Buuuut they're kinda meh. :I could use another one.
Ice/Steel
Would love to see this; even with 4 x to fire.
Poison/Psychic
Also a great type matchup, only weak to ground, dark, and ghost. MM.
Poison/Rock
Poison needs to be with more period.
Poison/Steel
Like Steel.
Normal/Dragon
Hadn't thought of this one
Then another combo of every type with Fairy lol, because Fairy needs some more variety.[/SPOILER]