level 35 or you can buy the TM for goldenrod city or find the TM in mt. silver
It learns AncientPower at level 36.
Tangela evolves when it has ancientpower and level it up.It learns ancientpower at level33.
After you get the National Dex, make Tangela learn Ancientpower at level 33, and then level it up.
Tangela has to level up while knowing the move Ancientpower.
Tangela > level up while knowing Ancientpower > Tangrowth
Tangela > level up while knowing Ancientpower > Tangrowth
it evolves by ancientpower
Teach it ancientpower then level it up.(it evovles into tangrowth)
Tangela evolves when it learns Ancientpower at Level 33.
Level 33. Also, it evolves into Tangrowth when leveled up while knowing AncientPower.
When you catch a Tangela, teach it AncientPower. Then level it up one more time. Then it will evolve.
If you mean by evolving then once it learns AncientPower at Lv.36 it will evolve