Wow, no kidding? Hilarious! Sounds exactly like the type of thing she'd do to her challengers.After taking off in his last appearance, he went to Hakutai/Eterna City because he heard about a free bicycle campaign. From there, he went to get the Relic Badge, but Melissa was away (again). He received a numbered ticket from the Gym to hold his place so he could return and challenge it.
As far as the bike is concerned, easy come, easy go.