The teenager was just 14 when she took her own life in 2018 after sustained bullying.

Dolly's mother and founder of charity Dolly's Dream, Kate Everett, travelled more than 4000 kilometres from her home in the Northern Territory to be at the event.

She said the whole equine community had been "incredibly supportive" of the charity.

"It's truly humbling to belong to a community like this," Mrs Everett said.

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Australian Stock Horses "general helper" Jackie Long said there were 55 lots up for sale, including some highly sought after items.

"There's a handmade stock whip that's blue and white - Dolly's colours - with a turquoise stone embedded in the handle," she said.

"One of our members donated a beautiful painting of an emu. Dolly's name is hidden in the head feathers 14 times, one for every year of her life."

The charity and its anti-bullying message has gained widespread support across the nation, particularly in regional communities.

While Mrs Everett was initially surprised by the traction Dolly's Dream got, she said the strong support showed there was a "very real need".

"I think that shows that there is a genuine need for this support, particularly for parents that need help dealing with tough situations with kids," she said.

"Part of what we are trying to achieve isn't just at a school level, it's at a community level. So to have sporting groups getting involved is fantastic."

The auction is expected to kick off at about 6pm at AELEC.

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