Championship series against each other would forge a lifetime of memories, and even a couple of friendships. The T-cats would come back with a vengeance though, returning to their winning ways and capturing Senior AA Championships in 1996, 1997, and 1998. Over the course of the last 10 seasons, the Thundercats won eight league championships. Finding themselves once again in the finals in 1999, they would suffer defeat at the hands of the upstart Milverton Four Wheel Drives. Prior to the 1999-00 season, the Thundercats engaged in a two-game home-and-home series against the Ontario Hockey Association's Senior AAA Cambridge Hornets. On September 25, the Thundercats won 4-3 and the next day the Hornets won 2-1. Such a matchup between WOAA and OHA senior teams was not seen again until September 30, 2017 when the Clinton Radars defeated the Whitby Dunlops 3-2 in a preseason game. No longer playing but still feeling the competitive spirit, Todd Stoddart took over coaching duties in 2000. Regular season success did not pan out in the play-offs as a seventh game loss to Palmerston in the semi-finals would put an end to the season. With future Mayor Kevin Eccles now behind the bench, the T-Cat's would knocked off the Hensall Sherwoods to win the Senior "AA" crown in 01', but would lose to Milverton in 02'. Longtime 72 & T-Cat Rob Reed would take over coaching duties in 2002/03 and amassed and incredible regular season record of 22 wins and 2 losses, tying the record of 1989. Again, regular season success proved to be fodder as the Cat's couldn't sustain their winning ways. In 2003/04, the Thundercats, with Reed behind the bench again, would plough their way through the regular season and then carry-on to win another Senior "AA" championship, defeating the Clinton Radars in the league final. 2004/05 proved to be an interesting season. With the 2004–05 NHL lockout looming, the Thundercats openly allowed the Ottawa Senators Chris Neil to practice with the team. With the cancellation of the season, Neil joined his three older brothers and signed with the Thundercats. Unfortunately he signed without permission from the WOAA. In the only game he played, Neil recorded one assist in a 5-4 win over the Mildmay Monarchs. Asked about Neil playing against his team, Monarchs coach's mentioned that it was unfortunate they were unaware Neil was playing, or they would have promoted it better.