Conversation so far:
What did Madvacharya believe?
Madhvacharya was a fierce critic of competing Vedanta schools, and other schools of Indian philosophies.
Why did he oppose them?
accusing Shankara and Advaitins for example, as "deceitful demons" teaching Buddhism under the cover of Vedanta.
Did Madhvacharya have any issues with other guru's?
Madhva criticized Advaita as being a version of Mahayana Buddhism, which he regarded as nihilistic.
Who did Madvacharya agree with?
CANNOTANSWER.

Question: What else can you tell me about Madvacharya?
Self-contained rewrite: Besides  Madvacharya believe, What else can you tell me about Madvacharya?