Robinson chose to highlight Mancini's moan earlier in the week that he was concerned his Premier League title plans could be hampered by a shortage of players.
He said: "I thought Mancini's comments about not being able to field a team with £350million (of talent) was embarrassing.
"I spent £35,000 on (striker) Charlie MacDonald and have got two 16-year-olds on the bench. Come and have a go at this, see how you feel.
"I can't spend £100million on players in the transfer window. I might go and get one or two cheeky loans. I believe those players deserve a shot at this league. I'm proud of them but gutted about the result."