Um... not really. Ok, lets do this:
You attack Pokemon A with Armaldo, that same Pokemon remains active and does not evolve. You then deal 100 to that Pokemon with Armaldo next turn. Assuming you knock out that Pokemon with that 100, they then bring up Pokemon B. When Armaldo attacks Pokemon B it deals 60.
The effect of dealing extra damage on placed on the Pokemon you attacked, not your Pokemon.
Now, if you want to be able to deal 100 damage a turn, you might want to try Metagross LA. It deals 50, then 100 every turn after as long as you keep attacking with the same Metagross and using the same attack. With Metagross, the effect of the extra damage is placed on Metagross, so if you KO something, you will still deal 100 next turn.