Ninja Saga Pet: Leiko(the snake)

You can buy and obtain these pets on Pet Shop - and it only costs you Gold.
Credits for cobaltblue, jinchuriki of Ninja Saga Forums.

Skills
1st skill - level 1: Normal Bite
2nd skill - level 10: Fear Sound
3rd skill - level 20: Poison Gas (Poison ~Reduce 3% of target's HP - 2 turns)
4th skill - level 30: Catalytic Matter : Increase master's all attack damage by 7% and reduce master HP by 2% (2 turns)
5th Skill : Secret Jutsu; Hazy Smoke - Spray smoke that makes the accuracy of the enemy be reduced to 5% for 2 turns.

General Requirements for Unlocking Pet Skills
1st skill: It's already there when you obtain this pet.
2nd skill: 200,000 gold
3rd skill: 300,000 gold
4th skill: 500,000 gold + magatamas: 6 (level 1)
5th skill: 1,000,000 gold + magatamas: 6 (level 1), 4 (level 2), 2 (level 3)
6th skill: 1,500,000 gold + magatamas: 10 (level 1), 8 (level 2), 6 (level 3), 4 (level 4), 2 (level 5)