However England were also in impressive form as they cruised past Italy 52-7, and with a superior points difference, despite a loss to Ireland in round two, the Red Rose youngsters will claim the title in case of victory.
Robinson, however, is adamant the support his side will receive in Colwyn Bay, where they beat Ireland in their opening game, will see them through.
He said: "Home crowd is why you love playing rugby and I've played up [in Colwyn Bay] a few times and the atmosphere is electric.
"It's great having that first game back and first one with the boys, it was good being in training with them, spending the time with them again. I think the boys put everything on the line [against Scotland].
"It's good to be back in the group with a great bunch of boys, I know how good they are.
"If we get another two yellow cards against England, that will be our Grand Slam over, we can guarantee that.
"So we are going to have to work hard on our discipline and not give any silly things away. We've done it in every game. But if we play with the spirit and determination we have I think we should be alright next weekend."
Wales racked up six tries in their win in Scotland, but England went one better against Italy.
Despite that, head coach Rob Hunter believes they are capable of much better ahead of their final clash.
He said: "It may sound churlish to say that we're unhappy after putting 52 points on the board but the reality is that we know we can play better. Italy were big and they were physical, and to be fair, on a slippery surface they forced us into making mistakes.
"Next week is a big game, and we'll certainly be working very hard over the next few days to make sure we deliver a strong performance against Wales."
Elsewhere on the final weekend Italy will look to record a first win of the competition against Ireland, who impressed last week seeing off France 22-5 with Conor Joyce scoring their only try.
Finally the French, who host the IRB Junior World Championships this summer, will be seeking only their second win of the competition against Scotland, having lost three straight since beating Italy on the opening weekend.