How would the game change if all pokemon would and could use two of their 3 respective abilities in battle in future generations?

[Matleo]

-what pokemon would gain the most, what would loose the most in this kind of scenario (Galar Weezing???)
-how would it change the useability of many pokemon?

 

[Parissong]

Most Pokémon would undoubtedly benefit. But what if their abilities contradict one another?

EX: Duraludon gets the abilities of either Heavy Metal or Light Metal, which changes its weight and contradicts on another since one doubles it and one halves it.

 

[CynthiaLover]

Not to mention that, in some cases, it wouldn't make any difference. Delibird, for example, has both Vital Spirit and Insomnia (the latter is a Hidden Ability, but it's still one of its abilities), and if it had both on at once, it would be completely redundant, as both do the exact same thing (prevent Sleep status). So, while many would benefit immensely, others would either have a contradiction (like stated above me) or make no difference at all (like my Delibird example). Plus, it could seriously unbalance the game (which is already rather unbalanced in most cases). For example, letting Garchomp have both Rough Skin and Sand Veil would turn it into an even bigger monster, as it would not only have an increased evasion in Sandstorms, but if the opponent does land a hit, they get hit by Rough Skin in retaliation. Which could also be on top of Sandstorm damage. So, in the end, it's better that each Mon only has access to one ability at a time, as while some would benefit greatly, it could cause a lot of problems (and a great deal of confusion) in the long run.

 

[Matleo]

Not to mention that, in some cases, it wouldn't make any difference. Delibird, for example, has both Vital Spirit and Insomnia (the latter is a Hidden Ability, but it's still one of its abilities), and if it had both on at once, it would be completely redundant, as both do the exact same thing (prevent Sleep status). So, while many would benefit immensely, others would either have a contradiction (like stated above me) or make no difference at all (like my Delibird example). Plus, it could seriously unbalance the game (which is already rather unbalanced in most cases). For example, letting Garchomp have both Rough Skin and Sand Veil would turn it into an even bigger monster, as it would not only have an increased evasion in Sandstorms, but if the opponent does land a hit, they get hit by Rough Skin in retaliation. Which could also be on top of Sandstorm damage. So, in the end, it's better that each Mon only has access to one ability at a time, as while some would benefit greatly, it could cause a lot of problems (and a great deal of confusion) in the long run.

yes but others would also gain from it too.
Confusion but would be more interesting then a new game mechanic?
In the long run, pikachu would get Static and Lighningrod. hmmm maybe you are right here, would be too perfect.

Most Pokémon would undoubtedly benefit. But what if their abilities contradict one another?

EX: Duraludon gets the abilities of either Heavy Metal or Light Metal, which changes its weight and contradicts on another since one doubles it and one halves it.

this kinda situations would suggest that 2 outof 3 would need to be paired to not collide.
Delibird would get a new ability.


What about a new game mechanic allowing a pokemon use 2 or 3 abilities at once? Similar to Dynamax, Z-moves, Megas?
For one pokemon per whole battle. Heracross would be happy.

 

[Nitro Indigo]

There's already a metagame on Pokémon Showdown about this called Pokebilities.

 

[Silktree]

If they had any sense, they would replace conflicting/redundant abilities to make things fair. And they would give new abilities to Pokemon with only one or two.

I don't think that very casual players would like it very much. It sounds messier than three types.