At WWF Breakdown
2005
If you mean when did he make his wwe debut then in 1998.
2003
WWE wrestler Christian was trained by former professional wrestlers Ron Hutchinson, Dory Funk, Jr., and Tom Prichard, and made his wrestling debut in June 1995.
The WWE did not debut. The WWE just changed their name to WWF.
To WWE - October 15th 2004.
Right now he is in FCW as Kevin Hackman and is still not very good but i can see him making his WWE debut in 2013 around the Rumble.
Sometime in 2004. He originally fought in WCW before WWE (debut in WCW when he was only 14)
1997 as Kane before that he was issac yankem
His wwe debut was in 2002.
John cena make his WWE debut in June 27, 2002 John Cena debuted in the WWE in 2002. Kurt Angle issued an open challenge to have anybody who hadn't faced him before wrestle him. John Cena came out this made his debut.
She got her debut July 2004.