You may cast Charmander without paying its mana cost if you control a card named Professor's Lab.

Ember - {1}{R}: Charmander deals 1 damage to any target. Charmander deals 1 damage to that target at the beginning of your next upkeep.

Evolve into Charmeleon {1}{R} (If you pay the evolves into cost, sacrifice this creature, then you may put a card named in the cost onto the battlefield without paying its mana cost)