Both evolve
Both can still evolve
The Both evolve connection is one of the evolution rules in the daily PokéWired Pokémon puzzle. Two Pokémon are linked by it when this holds: Both can still evolve.
It's not directional: it works both ways, so it doesn't matter which Pokémon goes on the left and which on the right. You'll meet it in Normal puzzles, and it can also show up in the Unlimited and Chain modes.
Evolution connections look at where a Pokémon sits in its family: which stage it is, how long its line is, and how it evolves — by level, by stone or by another method.
Examples
Real Pokémon pairs that satisfy the both evolve connection:
Bulbasaur#1Both evolve
Charmander#4Both can still evolve
Ivysaur#2Both evolve
Charmander#4Both can still evolve
Charmander#4Both evolve
Squirtle#7Both can still evolve
Charmeleon#5Both evolve
Squirtle#7Both can still evolve