I loooooove this game, btw...
I used all the key cards that I found in the power plant, but I can't find another one so I can open the door to the boss. Are there enough key cards inside the power plant to open all the doors? Or do I have to find another one somewhere else?
No, you don't have to exit the level to find more keycards. There's one keycard about in the middle of the level that you only get by killing all the enemies on the screen... maybe that's the one you're missing?
lol... I found it... but later in the ? dome, I died... continued... and respawned in a wall. 😞
Hmm... do you happen to know the exact location where you died?
Oh and what version of Zelda Classic are you using to play MMDWR DC?