Since this thread now have a positive counterpart, I’ll bring something from Generation 5.

Sure, there might be chances that the two forms aren’t single-staged anymore if Basculegion turned out to be a traditional cross-generational evolution, but I’ll put them in anyways since they were single-staged in Generation 5, and possibly still are if Basculegion turns out to have a regional variant of Basculin as pre-evo.
*Clears throat* So why Basculin is among the worst of single-stages? It was for the fact that nothing interesting about them outside of nearly-interchangeable Blue-Striped form that only differs in design and Rock Head instead of Reckless.
You know something will go wrong when one realize they are late additions in the development just because Game Freak wanted a common fish Pokémon.
As themselves, they are decent and Adaptability comes with a pretty strong edge. Problem is that they are also everywhere when surfing in water, meaning that they get annoying really fast. 92 Attack and 98 Speed are acceptable, but falls off late game.
The bigger problem is that Water is already by far the most numerous Pokémon by quite a large margin. Just BW already offers good Water-type options, from Oshawott line, Frillish line, Tympole line and the Tirtouga line having their own distinguishable niches. B2W2 also adds more Water-type powerhouses in the form of several previous generations Pokémon in the main campaign.
Worst part is that a Water-type Pokémon with Adaptability not only already exists as their Hidden Ability, but is still much better user of it. We are talking about the Corphish line, where while it is their Hidden Ability, they are potent with it thanks to Dual STAB as Crawdaunt and higher Attack. While they are slower, it can be circumvented with Aqua Jet becoming effective 80 BP, as strong as pre-nerf Sucker Punch, and post-buff Knock Off offering wallbreaking and item removal in one button press!
It is a good thing that GF realized how disappointing Basculin is in the long run, if Basculegion is anything to go by.


Sure, there might be chances that the two forms aren’t single-staged anymore if Basculegion turned out to be a traditional cross-generational evolution, but I’ll put them in anyways since they were single-staged in Generation 5, and possibly still are if Basculegion turns out to have a regional variant of Basculin as pre-evo.
*Clears throat* So why Basculin is among the worst of single-stages? It was for the fact that nothing interesting about them outside of nearly-interchangeable Blue-Striped form that only differs in design and Rock Head instead of Reckless.
You know something will go wrong when one realize they are late additions in the development just because Game Freak wanted a common fish Pokémon.
As themselves, they are decent and Adaptability comes with a pretty strong edge. Problem is that they are also everywhere when surfing in water, meaning that they get annoying really fast. 92 Attack and 98 Speed are acceptable, but falls off late game.
The bigger problem is that Water is already by far the most numerous Pokémon by quite a large margin. Just BW already offers good Water-type options, from Oshawott line, Frillish line, Tympole line and the Tirtouga line having their own distinguishable niches. B2W2 also adds more Water-type powerhouses in the form of several previous generations Pokémon in the main campaign.
Worst part is that a Water-type Pokémon with Adaptability not only already exists as their Hidden Ability, but is still much better user of it. We are talking about the Corphish line, where while it is their Hidden Ability, they are potent with it thanks to Dual STAB as Crawdaunt and higher Attack. While they are slower, it can be circumvented with Aqua Jet becoming effective 80 BP, as strong as pre-nerf Sucker Punch, and post-buff Knock Off offering wallbreaking and item removal in one button press!
It is a good thing that GF realized how disappointing Basculin is in the long run, if Basculegion is anything to go by.