Yes that's correctI think that tweet was referring to individual episodes.
Mighty B started 2008 and until 2011.
Starting with episode "Awww-esome/Dogcatcher in the Rye" last aired on Nickelodeon and also first to air in 2010s decade: Jan 2, 2010 (to air Jul 25 4:30am as scheduled). Later episodes were moved to Nicktoons network in fall 2010.