Dugtrio is the last form of diglett so that means it doesn't evolve.
Diglett evolves into Dugtrio, starting at level 26.
Diglett evolves into Dugtrio at Level 26.
Level 10.
Level 20.
Crobat doesn't evolve.
Dugtrio.
Diglett evolves into Dugtrio at level 26, and instantly learns the move Sand Tomb
Dugtrio does not evolve. It's pre-evolution Diglett evolves into Dugtrio at level 26.
Diglett evolves into Dugtrio at level 26.
Diglett evolves into Dugtrio, starting at level 26.
Digglet evolves into Dugtrio at level 26.
Yamna does not evolve in FireRed.
Lickitung does not evolve in FireRed.
Diglett evolves into Dugtrio at Level 26.
Digglet evolves to Dugtrio at level 26
It evolves into Dugtrio at level 26.
No Dugtrio is not capable of evolving.