Mario

Mario is a major character in the TV show Mushroom Guard, and the leader of the titular group.

Past Heroics
Prior to the start of the series, Mario had saved Princess Peach from Bowser's clutches multiple times. Tales of his heroics spread all over the world, including to Inkopolis, giving Zac and Sarah the inspiration to eventually move to the Mushroom Kingdom.

Peace with the Koopas
Eventually, Bowser and the Koopas decided it was time to consider a truce. A kart racing championship was held as a peace offering, and Mario was one of the participants. After the championship ended, Bowser vowed to stop attacking the Mushroom Kingdom, a vow which would last for exactly 1 year before being broken...

Contemplating Retirement
When Dr. Hex threatens the Mushroom Kingdom, Mario pursues her with Luigi in tow. When the villain escapes, Mario wonders if his glory days are over. He considers retiring, but instead decides the time has come to train a new group of heroes.

Establishing the Mushroom Guard
When Zac and Sarah help the Mario Bros capture the newly emerged villain, Mario adds them to the newly-formed team, alongside Luigi, as well as old friends Daisy, Berry and Gold.

Personality and traits
Mario's personality and traits are mostly the same as his canon incarnation.

In general, he is a courageous leader who cares deeply for his allies.

TBA

Allies
Mario's interactions with Luigi are similar to their canon incarnations. They are protective and supporting of each other.

Mario gets along well with Daisy, Berry and Gold, providing encouragement to them during battle.

He serves as a mentor to Zac and Sarah, and it is implied that he views them as if they were his own children.

The relationship between Mario and Peach is left vague, however it is implied that they are dating.

Mario also considers Toadette and Agent 3 to be his allies. He is noticeably impressed upon learning about Agent 3's heroics.

Enemies
Mario has clashed with Bowser and the Koopa Troop for a long time. Prior to the start of the series, he was willing to give them a second chance, but when the Koopa Troop betray the Mushroom Kingdom, Mario is more disappointed than anyone else.

Mario sees Dr. Hex as a major threat to the Mushroom Kingdom. He vows to protect the Kingdom from Hex's schemes.

Trivia

 * Mario can be considered as a counterpart to both Master Eon and Jet-Vac from Skylanders Academy: while Master Eon and Jet-Vac serve as leaders off and on the battlefield respectively, Mario plays both roles.