McDonald's currently has six Power Rangers Megaforce cards in their Happy Meals. They're numbered MC001 - MC006. The design matches the current Bandai Power Rangers card game sets. (Edited to show correct number).

This message has been edited. Last edited by: dstrohmeng,

There are actually 6 different cards, 1 for each toy. There are 2 different cards for the Red Ranger.

I realized there were 6 and came back to change it, but you beat me to it.