pinkamena diana pie is the pinkie pie´s full name! (is octavia sister) but, when someone get mad with you, for some reason, call you by your full name. for that reason, in the fandom, pinkamena is something diferent to pinkie.
Trixie: Pinkie! the construction pegasi just finished fixing the last comic border that you broke, not to mention the fourth wall, which we've had to replace like five times, the Great and Powerful Trixie is not pleased