This one is tough as nails! Join the 'Rusty Rose' event to gain special cards for Rusty Rose! There will be FREE gifts of Challenger cards throughout the event, so make sure you check the store regularly.
Tails' Vault will cover the 'Tails Nine' and the 'Rusty Rose' events. Unlock it early to take advantage of the bonus box.
The event's bonus box contains 10 Tails Nine and 10 Rusty Rose cards. Open a Bonus Box every 24 hours during this event. Cards from each stage of the event will go into a single Vault. Purchasing a single Vault key will allow you to open this Vault throughout each stage of the event.