Thunderpunch is not a TM in Emerald. You have to learn it from the Move Tutor at the Battle Frontier (in the tent just left towards the Battle Dome, talk to the old lady on the right).
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There is no TM for thunder punch.
The TM thunder wave no longer is a TM.
No
You can't. Only in the second generation (gold, silver, crystal) it's TM41. In Diamond and Pearl is their no Thunder Punch TM. You can learn Thunder Punch in Pokemon Platinum from the Move Tutor.
no it can't.