First, Heavy-Duty Boots don’t appear in the compilation of included items.
So it isn't in the game?
It's as bad as you think, if not worse. Lopunny used to learn Return naturally (and is the only species ever to do so), which was its go-to STAB move. Now Return is nothing but a happy memory. Pretty much every Normal-type up to Gen 4 had Body Slam and Double-Edge via learnset or FRLG move tutor. Sinnoh monsters like Lopunny were the first to miss out. Body Slam would not become available again until TR01 in Gen 8, when Lopunny was explicitly denied it after thirteen years. But hey, it picked up Mega Kick! That's... got to count for something, right?
Oh, and would you like to know why Headbutt is in there? Dizzy Punch also got cut in Gen 8. As did Jump Kick, its staple level-up coverage option.
All of Lopunny's defining moves since its first appearance in the series—gone.
Yeah normal types where never that great but at least some were decent. Now they're almost all useless.