Crocker said that the team's efforts and self belief throughout the second half of the season – and especially in the last few weeks – was a testament to its development.
The Roos won their third game in four weeks on Saturday night at AAMI Stadium, defeating Port Adelaide by four points after trailing for most of the game.
Last week North Melbourne got over the line against league leaders St Kilda after a fierce challenge by the Saints.
"The same thing happened again tonight – we hung in there and again, were able to get a win. I think our belief is growing all the time," Crocker said.
The hard-fought victory came after the Roos adjusted their playing style at half time and were able to recover from 20 points down in the third quarter.
"I think in the second half we started to take on the game a little bit more, and started to use our options and move the ball with a little more fluency," Crocker said.
"I think [the win] meant a hell of a lot in relation to where we're heading as a football club.
"When I first took over for the second half of the year I gave the players a vision of where I felt we were at that particular time, and that was as a developing team, a team on the rebuild."
Crocker said that although he knew that the Roos could not become a great team in the time that he was in charge, if every player could show some improvement it would show the league that North Melbourne was capable of becoming a good side.
"Good sides are hard to beat. And I think that most weeks we've either been hard to beat or – in the later part of the year – we've been able to notch a few wins."
Crocker said the club was in a great position, with younger players coming through who were starting to grow and believe in themselves.
"I think we're starting to play the type of football that is going to take us into the modern era," he said.
"I think we've got to start being recognised as a pretty talented group going forward. The horizon is looking bright."
