Crushed flake food will not properly cycle your tank in preperation for living animals as Digger mentioned. The only way, IMHO, is too add bioload (animals) to the tank. Start small and increase the load slowly untill you reach the desired stocking levels. That is easy to do with a community tank where there are 20-30 fish that can be added slowly but with a single larger specimen it is more complicated.
There are several ways to get what you need though.
1. Take a canister filter and fill it with the substrate you are using in your tank. Place it in/on an established tahk and it will be properly colonized in a few weeks. A friend with a healthy tank is an asset to be called upon from time to time.
2. Set-up you rank the way you want and cycle it with a few starter fish. I find white cloud minnows to be great for this. I keep them in there for a few weeks till I see a spike and subsequent normalization in Ammonia, Nitrite, and Nitrate in that order. Once Nitrate normalizes you can add the axie. The cycle will repeat due to the increased bioload but it will be quick. The fish will keep the axie on the prowl as well as serve as a source of food that you have basically had quaranteened for 30-60 days. Obviously if the fish seem ill in any way don't add the axie
3. Set-up you rank the way you want and add your axie. Axies produce a decent ammount of waste so you will see the nitrogen cycle start with a vengance.
In all three of these scenarios the cycling will take a few weeks. In 1 and 2 the cycle will be quick as the existing colony of bacteria only need to adjust their population density to handle the new bio-load. Scenario 3 takes the longest as the entire process needs to take place from scratch.
In all three scenarios, monitor Nitrate and do 20% water changes weekly till the Nitrate normalizes to zero. Also remember that in an unfiltered tank with a bare bottom there is little surface area for colonization and a single heavy feeding can cause a drop in water quality if you don't remove uneaten food quickly. Probably more than you wanted but I was feeling chatty. Happy Saturday.