McCoulsky downed Sky Bet Championship side Leeds in the third round of the FA Cup on Sunday with a soaring last-minute header.
Newport’s 2-1 win was another chapter in McCoulsky’s memorable season, as he was at Ashton Gate last month when the Robins knocked Manchester United out of the Carabao Cup.
And now McCouslky hopes Lee Johnson’s side can upset Manchester City in the first leg of their Carabao Cup semi-final on Tuesday night.
“I went to the Man United game in the last round and they performed very well,” McCoulsky said after his dramatic introduction as a second-half substitute at Rodney Parade.
“Who knows? Maybe they can go to Man City and cause another upset like Newport did.
“They’ve done great, but as a player being on the pitch for this (Newport’s win) is better.
“We’re also both doing well in the league compared to last year, so it’s all good.”
McCoulsky is Newport’s top scorer this season with 11 goals.
But the 21-year-old Londoner has lost his starting place recently and might have moved on from the Sky Bet League Two side.
“There was interest from other clubs, but I wanted to stay here to score goals and help the team,” McCoulsky said.
“I just want to move up the league and concentrate on my football.
“As a player you obviously want to play at the highest level possible, but I’ve just got to keep doing what I’m doing at Newport.
“I was so happy to score the winner against Leeds, for such a small club like Newport to knock out a big Championship club is brilliant.”
On his incredible leap from Robbie Willmott’s corner, McCoulsky added: “I’ve watched the goal back and didn’t know I jumped that high.
“It’s one of those things in the moment.
“I just saw the ball in the air and threw my whole body at it.”
Leeds are currently sixth in the Championship and mounting a promotion challenge.
Manager Thomas Christiansen said he was determined that his side’s shock cup exit would not damage those hopes.
“It was very bad of course,” Christiansen said.
“The result was the worst and we didn’t give everything that we have during the game.
“We need to see many things, but we will have time to work on that.
“They know what went wrong and what I expected from them. Now we need to focus on another competition.”
Pivotal game in Group E almost a pick ‘em with the bookies