Falstaff

Falstaff is a character in many plays by William Shakespeare. He figures prominently in:

• [Henry IV pt one]?
• [Henry IV pt two]?
• [Henry V]?

There is a LOT to say about him. Would someone like to start?

Giuseppe Verdi's last opera, an [opera buffa]?, is based on (...) and it's called also Falstaff?