Same line len
Evolution lines of the same length
The Same line len connection is one of the evolution rules in the daily PokéWired Pokémon puzzle. Two Pokémon are linked by it when this holds: Evolution lines of the same length.
It's not directional: it works both ways, so it doesn't matter which Pokémon goes on the left and which on the right. It belongs to the Hard rule set, so you'll only run into it in Hard puzzles.
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 same line len connection:
Venusaur#3Same line len
Charizard#6Their evolution lines have 3 stages
Charizard#6Same line len
Blastoise#9Their evolution lines have 3 stages
Blastoise#9Same line len
Butterfree#12Their evolution lines have 3 stages
Butterfree#12Same line len
Beedrill#15Their evolution lines have 3 stages