This part of IGN's Mario Strikers: Battle League wiki guide covers how to play multiplayer. There are a ton of options for online, wireless, and local
Mario Strikers: Battle League - Super Mario Wiki, the Mario encyclopedia
Tips and Tricks - Mario Strikers: Battle League Guide - IGN
Mario Strikers: Battle League Review - IGN
Story Mode - Mario Strikers: Battle League Guide - IGN
Mario Strikers: Battle League Guide - IGN
Mario Strikers: Battle League - Hyper Strikes Trailer - IGN
Tips and Tricks - Mario Strikers: Battle League Guide - IGN
Mario Strikers: Battle League - Super Mario Wiki, the Mario encyclopedia
Tips and Tricks - Mario Strikers: Battle League Guide - IGN