Due to the lack of variety of items in PWO currently, as well as the inability to sell items for one moneymaking method (among the lack of other viable moneymaking methods), pokemoney drops were added to Pokemon to provide some obtainable source of pokemoney early on. Although this was not featured in the handheld games, the concept of looting money from any form of a battleable spawn is a practical, and reproducible, method of moneymaking in various MMORPGs - unprecedented features in the handheld games may still be added to an MMO interpretation of the franchise to better suit an MMO environment, and this is considered one of the more technically feasible moneymaking methods.
Furthermore, the functions of various items are not supported/compatible with PWO's mechanics at this time, thus the addition of many items in game has been omitted as they would serve no use currently. The main items that have been supported at this time are: Pokeballs (regular only), healing items, evolution items, and items that are required for the progression of a quest/travel (badges, to name one). However, some of these available items have been made as Pokemon drops, somewhat specific to a Pokemon; for example, a Metal Coat is dropped by Magnemites.