Q: Context: Luigi (Japanese: , Hepburn: Ruiji, ( . i. di) ) (English: / luidi /; Italian: ( luidi) ) is a fictional character featured in video games and related media released by Nintendo. Created by prominent game designer Shigeru Miyamoto, Luigi is portrayed as the slightly younger but taller fraternal twin brother of Nintendo's mascot Mario, and appears in many games throughout the Mario franchise, often as a sidekick to his brother.

Question: who is the older brother mario or luigi? Let's give stream of consciousness first:
To answer this question, we should know that: Created by prominent game designer Shigeru Miyamoto, Luigi is portrayed as the slightly younger but taller fraternal twin brother of Nintendo's mascot Mario, and appears in many games throughout the Mario franchise, often as a sidekick to his brother. Therefore, the final answer is Luigi.