In Anime Arena, gold and coins are the main currencies of this game.
To get these currencies, you can try to use these following steps
When you sign in to play this game for the first time, you will be rewarded with some gold, coins and other valuable rewards
Then, you can also get rewards in specific amount of time ranging from 1 minute, 10 minutes, 30 minutes, 60 minutes to 90 minutes when you are online.
Every time, you sign in this game daily, you will get corresponding rewards.
You can get a bunch of rewards usually placed on the 20th to 30th day on the month
In related to the gift code, you can get it after opening a new server.
Then, all players joining the game will get rewards through forum or medium zone.
When being active to play this game in 7 days, Daily Boon, you will get rewards for every login.
Here, you can charge in that day to receive rewards.
When being in Main Copy, you must finish some specific copy stage or chapters and get rewards.
In Ward Up, you can upgrade your Wards and get some rewards.
Then, in Hero Gather, you can collect Heroes and get some rewards.
In Arena, if you have higher rank in the arena, you can get more Train Bear.
Thus, just keep playing this game regularly to get more rewards