In 1997, Max Mini signed with the World Wrestling Federation (WWF). Mini wrestled on Raw on March 17, 1997, in a minis tag team match, teaming with Mini Goldust versus Mini Mankind and Mini Vader. Max Mini made his in-ring debut at Ground Zero: In Your House, where he faced El Torito. He later appeared at Badd Blood: In Your House, where he and Mini Nova faced Tarantula and Mosaic. The match was not originally scheduled for the pay-per-view, but the originally scheduled match was cancelled as Brian Pillman was found dead earlier that day. Nova and Mini won. On November 11, 1997, the minis made an appearance on WWF Raw, where Max Mini, Nova and Taurus fought Battalion, Tarantula and El Torito. The match was interrupted when Kane came to the ring and scared off the minis. Max Mini made one further pay-per-view appearance at the 1998 Royal Rumble, where Max Mini, Nova and Mosaic defeated El Torito, Tarantula and Battalion. The Minis did not appear on WWF television until the federation created their WWF Super Astros show. Max and Nova faced off in a singles match to settle their differences in the ring, but Mini Nova cheated to win the match. Subsequently Mini Nova teamed with Battalion to face Max Mini and El Torito. Finally on May 30, 1999, Nova faced Max Mini in a match where both men put their masks on the line. Max Mini won and unmasked Mini Nova. Max Mini only made a few other appearances before leaving the WWF.
Mini once again began working for World Wrestling Entertainment (WWE; Formerly the WWF) in their Juniors division. The Juniors division was created in October 2005 and was exclusive to the SmackDown brand. Mini, as Tzuki, only made one wrestling appearance on the actual SmackDown show, a tag team match where he teamed with Mascarita Sagrada to take on Octagoncito and Pequeño Violencia. The match ended in a no contest after interference from Finlay using the mini stars to make a point. On February 21, 2006, Tzuki lost to Mascarita Sagrada in a singles match taped for WWE Velocity. By March 2006, the WWE gave up on the Juniors division and released all the mini wrestlers, including Tzuki.