Not only it has Bleach and Naruto, Gintama also has Prince of Tennis shown in the series...
Gintama Ep. 62 (Season 1)
It's Yamazaki! Not Echizen
We have Segaku team
Hyoutei team too...
Eh? What's that? Twist serve? He can do twist serve?
" Mada mada dane" too? That's obviously plagiaries ~
There are also several episodes in which Yamazaki disguise as Ryoma.
P/S: Can't wait for the 2nd movie... maybe I have to wait until next year... aish!