Butterfinger Cups is touting itself as the go-to treat for Manny "Pacman" Pacquaio, who is the reigning WBO welterweight world champion and is defending his title next month.

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Butterfinger is getting behind Pacquaio with its Get In Our Corner campaign, a month-long rally to support the champion who has a 57-5-2 record with 38 knockouts.

The 35-year-old Filipino fights 37-year-old Grand Rapids native Floyd Mayweather, Jr., now of Las Vegas, in a welterweight world championship unification bout on May 2 in Las Vegas.

If Pacquiao emerges victorious, Butterfinger is offering one million of its peanut butter cups in a nationwide payout at ButterfingerCups.com.

“We’re such fans of what Manny represents and love that he has such a great sense of humor to join us in our April Fools’ Day fun and launch the ‘Get In Our Corner’ campaign,” said Fabiola del Rio, Butterfinger brand manager. “We want fans to get in our corner with Manny and help us celebrate."

Pacquaio fans are encouraged to use the hashtag #GetInOurCorner to show their support of Pacquiao.

Online, fans can see the action unfold on Butterfinger’s Facebook or Twitter pages.

Square-shaped like a boxing ring, Butterfinger Cups debuted last year and added recently were Butterfinger Peanut Butter Cups Minis.