Richard Dunne joined the Republic squad on Monday after not playing a game for Aston Villa all season because of a persistent groin injury.
The Aston Villa defender will not feature against England but could be in contention to play in Sunday's friendly against Georgia.
The Republic's resources in central midfield were in danger of being stretched with Paul Green (hamstring) already ruled out but Glenn Whelan (calf) and James McCarthy (hamstring) have both shaken off knocks and are included.
"Ours play for Stoke and many teams - England's play for Manchester United, they play for Arsenal, but we can show them we are the same," he said.
The Italian's squad is drawn largely from clubs occupying the lower reaches of the Premier League and the upper reaches of the Championship, but they will go head-to-head with Roy Hodgson's aristocrats as the two countries meet for the first time since 1995.
Having seen his players repeatedly defy the odds against supposedly stronger nations, Trapattoni is confident they can make life intensely difficult for England.
"That's a stimulation for me - it's very important that they show they are every bit as good," added Trapattoni.
Trapattoni and Hodgson are old foes from their days in club management in Italy and bumped into each other at the Champions League final at Wembley on Saturday evening.
However, the Ireland boss was less than sympathetic over his English counterpart's injury troubles.
He said with a smile: "I met him at Wembley. He told me he has doubts about missing some players, but I don't think so.
"He's missing Steven Gerrard - OK; Andy Carroll is also out, but they have a strong team. They have others - Jermain Defoe, Wayne Rooney, Daniel Sturridge, Danny Welbeck - it's OK, he has enough offensive players.
"But I have confidence because our team in the last game gave me much trust."
The match will be one of four the Republic will play over the next two and a half weeks with the World Cup qualifier against the Faroe Islands by far the most important.
There is also a meeting with Georgia on 2 June at the Aviva Stadium and a glamour friendly against Spain in New York on 11 June.
Republic of Ireland team:
Forde; Coleman, O'Shea, St Ledger, Kelly; Walters, McCarthy, Whelan, McGeady; Keane, Long
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