Te Akau Racing will bid to continue its indomitable run in the Karaka Million 2YO at Ellerslie with five runners, led by undefeated youngster On The Bubbles.

Trainer Jamie Richards has nominated On The Bubbles as the stable's leading chance to claim a fifth successive win in New Zealand's rich two-year-old race.

Te Akau has claimed the feature for the past four years with Melody Belle (2017), Avantage (2018), Probabeel (2019) and Cool Aza Beel 12 months ago.

Two years ago, Probabeel overcame a wide gate to win and Richards is hoping On The Bubbles can do likewise on Saturday after coming up with the outside barrier.

"We have won it from out there before, so why can't we do it again?" Richards told the NZ Racing Desk.

"He is going to need a bit of luck, that is all."

On The Bubbles' two wins include a three-length victory at Ellerslie earlier this month and Richards says the horse has continued to do well.

"I like the fact that he is a winner and he has come through the right race and he couldn't have been more impressive last start. He is going the right way," Richards said.

The leading trainer will also saddle up Sophisticardo, Sneaky Shark, Millefiori and Avonallo in Saturday's 1200 metre showpiece.