Discord frequently partners with Crunchyroll. If you subscribe to Discord Nitro (usually $9.99/month), you often get a free 3-month Crunchyroll Mega Fan code as a "Gift" in your Discord inventory. Check your on Discord regularly.
For further assistance, you can visit the Crunchyroll Help Center for specific articles on prepaid codes and gift cards . crunchyroll premium code
If you cannot find a working code, do not despair. Crunchyroll still offers one of the most generous streaming trials on the internet. Discord frequently partners with Crunchyroll