An Electron-Ion Collider (EIC) is planned to be built in Brookhaven National Laboratory with the contribution from Jefferson National Laboratory. To have a high luminosity, both the EIC ion bunch and the EIC electron bunch are designed to be flat during their collision. The existing injector source provides a round beam of width 2.5 μm rad transverse emittances. In this paper we investigate the option of dynamically crossing the 2𝜈_𝑥 - 𝜈_𝑦 coupling resonance in order to create a flat-beam ratio 𝜖_𝑥/𝜖𝑦 of up to 4. Furthermore, we explore the possibility of using a pulsed- or AC skew sextupole magnets to achieve a similar effect. Using one of these methods for flat beam creation will help lower the ion beam cooling time.