The party is fielding seven candidates in Haryana, nine in Kerala and five in Delhi.
Why in Kerala?
"Wherever there is CPI-M (Communist Party of India-Marxist) the Trinamool will always be born (to defeat it)," a Trinamool official, a close aide of Banerjee who is in charge of affairs in Delhi and the region, told IANS.
He said the party expects to get "respectable number of votes" in its debut in Kerala.
The Trinamool ousted the Left from its bastion of power in West Bengal after 34 years. The party has expressed confidence of winning 35 of the 42 seats in Bengal.