Talking to reporters here, Modi said in a democratic set-up, everybody has the right to float political party, but giving a political alternative is a different matter.
"It is also another matter to set up a political party, to run it and ensure victory of candidates," Modi said.
"Team Anna also has a right to float a political party, but this step will be a political mistake," he said.
"I am saying this since I was part of the JP movement and I can tell on the basis of my experience about it," Modi said.
However, Modi said Team Anna's decision to float a new party did not pose any danger to BJP and NDA.
"We support Anna Hazare and Ramdev for their fight against corruption and the Congress will have to face the consequences," he said.
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Modi said there was no need for Anna Hazare to be disappointed if the Centre did not give due weightage to his agitation against corruption as the people's sentiments were with them.
He alleged that the Congress was not in a position to fight corruption effectively as reflected in the Congress-ruled states.