I thought I'd put together a little guide on the Gintama X Kuroko no Basket collaboration in the mobile game, Kuroko no Basuke Street Rivals!
I will note that I do rely on Google Translate to translate some of the images on here, so please excuse some inaccuracies
1. Login Bonus
This is your standard log in bonus section. Logging in for 10 days will get you free rewards! The first time you log in will net you a free Gintoki! Other notable rewards include Gintama related icons and banners!
If my memory serves me correctly, you don't need to log in and claim rewards for 10 consecutive days. Just logging in ONCE during the event will be enough. Even if you don't log into the game, after a day passes, you'll still be eligible to claim the next reward. So just be sure to log in 10 days after your initial log in to claim the rewards.
2. Exchange Shop
This collaboration also features its own limited time event currency. By completing missions, you'll be able to obtain this currency to exchange for items in the shop! Some notable items include training cards and awakening cards for Gintama characters
As for the missions, there are 14 different missions, 12 which grant you coins, and 2 which grant you a unique Gintama-themed basketball court!
The missions below are as follows:
1. Acquire Gintoki and Kagura.
Reward: Daytime Gintama basketball court
2. Have Gintoki and Kagura achieve 50% skill progress.
Reward: Nighttime Gintama basketball court
3. Complete all 8 Gintama training missions.
Reward: 100 event currency
4. Complete 1 Yorozuya request.
Reward: 5 event currency
5. Complete 5 Yorozuya requests.
Reward: 25 event currency
6. Complete 10 Yorozuya requests.
Reward: 50 event currency
7. Complete 20 Yorozuya requests.
Reward: 80 event currency
8. Roll the dice 30 times in Gintama Adventure.
Reward: 15 event currency
9. Roll the dice 50 times in Gintama Adventure.
Reward: 25 event currency
10. Roll the dice 100 times in Gintama Adventure.
Reward: 50 event currency
11. Unlock Gintoki.
Reward: 5 event currency
12. Unlock Kagura.
Reward: 50 event currency
13. Unlock Hijikata.
Reward: 50 event currency
14. Unlock Okita.
Reward: 50 event currency
3. Yorozuya Request
This is a random daily quest that grants you 10 event currency, 2 dice (more on that later) and 50 lemon juice (EXP material).
(ignore the "Event has ended," i was able to do this quest just fine today)
4. Gintama Adventure
This is a board-game section where you roll a dice to advance your Justaway around the board! You get 2 free dice everyday. There are 3 different special spaces you can land on:
the ? spaces grants you a random reward (usually level up materials)
the ones with the numbers will advance you forward that many steps,
the golden spaces grants you the event currency.
Passing the start will net you additional rewards, which change how many times you have passed start before.
5. Gintama Training
When you unlock a certain character, you'll receive some trial missions you can complete with them. Complete those to unlock the rewards on this page!
6. Unlocking Kagura
If you don't have Kagura, this button sends you to the gacha to try and unlock her. If you DO have her, you'll be shown her special missions to unlock some level up materials for her!
7. Gintoki's Trial Missions
Same thing as before. If you don't have Gintoki, it will send you to where you can unlock him. If you DO have him, you'll be shown his trial missions. Alot of these missions can be completed by leveling him up and playing with him in Ranked matches.
I translated some up there, and as you can see, you have to clear all the trial missions on one page to unlock the next page. However, you CAN complete missions you HAVEN'T unlocked yet, you just can't claim the rewards until you unlock them.
8. Cumulative Charge
This menu is just giving you extra rewards based on how much Yen you spend while the event is active.
But yeah! That's more or less the gist of the event! In case anyone was already playing and just needed a quick reference, or if anyone just started and needed some help, I hope this guide was useful!