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Hit 'Search the MCP', then type the name in the search place.

I tried Sasquatch, and...

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Yawn, stupid slow connection! Stupid twenty windows open at once!

Well, when it works, you get a...

http://www.chronologyproject.com/

This is called the "Marvel Chronology Project', and it tries to list every appearance of every Marvel character. While it doesn't do it by team, only...