Even with over 18.22 million units sold worldwide, Nintendo's exercise game Wii Fit has managed to maintain its strong sales, capturing the top spot for the sixth consecutive week on Chart-Track's U.K. platform-specific sales chart for the week ended May 9. The Nintendo trio of Wii Fit, Wii Play and Mario Kart Wii was able to maintain the top three spots for the second consecutive week in the region. The appearance of Rhythm Heaven (known as Rhythm Paradise in the U.K.) at number 10 is a surprise, as the game ranked 33rd a week ago -- sales rocketed 125 percent over the game's debut week, Chart-Track said. Falling off of the top 10 weekly chart was Atari's The Chronicles of Riddick: Assault on Dark Athena and Ubisoft's My Fitness Coach for Wii. Nintendo's Rhythm Heaven and Brain Training for DS worked their way back onto the top 10 this week. The two-week old X-Men Origins: Wolverine for Xbox 360 and PlayStation 3 once again captured top 10 spots. Chart-Track said that in its multiplatform charts, which combines unit sales of all versions of a game, Wolverine's sales were up 16 percent over its debut week, clinching the number two spot overall. Below are the unit sales rankings for individual platforms for the week ended May 9:

Leisure software charts compiled by Chart Track, (C)2009 ELSPA Ltd