Methylone also contains a ketone group and as such should react to some of usual tests for ketones.
If you can obtain the chemicals required, then I would suggest using Marquis first, followed by a test for ketones.
2,4 Dinitrophenylhydrazine reagent is generally regarded as a good test for ketones although some ketones may react to form an oil residue which won't dissolve.
25ml of ethanol is mixed with 25ml of 85% ortho-phosphoric acid. Into this 75mg of 2,4 Dinitrophenylhydrazine is dissolved.
Formation of a precipitate is regarded as a positive result. If the product is air dried, it should a yellow-orange product. The reagent is stated to last for several days if kept in a refrigerator.
Ref: Jork et al, Thin Layer Chromatography, reagents and detection methods vol 1a
This next test may be compounded by the presence of the amine, although literature tends to indicate otherwise. Sodium Nitroferricyanide is used in Simons reagent (termed a modified nitroferricyanide test by Clarke), although the formulation is different to this:
2ml of a solution of 1% nitroferricyanide is mixed with sample and 1 drop of 2M NaOH added.
An orange color indicates a ketone.
Ref: Clarke's Analysis of Drugs and Poisons