  It has been recently shown that the observed morphological properties of the
Bullet Cluster can be accurately reproduced in hydrodynamical simulations only
when the infall pairwise velocity V_{c} of the system exceeds 3000km/s (or at
least possibly 2500 km/s) at the pair separation of 2R_{vir}, where R_{vir} is
the virial radius of the main cluster, and that the probability of finding such
a bullet-like system is extremely low in the standard \Lambda CDM cosmology. We
suggest here the fifth-force mediated by a coupled Dark Energy (cDE) as a
possible velocity-enhancing mechanism and investigate its effect on the infall
velocities of the bullet-like systems from the CoDECS (COupled Dark Energy
Cosmological Simulations) public database. Five different cDE models are
considered: three with constant coupling and exponential potential, one with
exponential coupling and exponential potential, and one with constant coupling
and supergravity potential. For each model, after identifying the bullet-like
systems, we determine the probability density distribution of their infall
velocities at the pair separations of (2-3)R_{vir}. Approximating each
probability density distribution as a Gaussian, we calculate the cumulative
probability of finding a bullet-like system with V_{c}>=3000 km/s or
V_{c}>=2500 km/s. Our results show that in all of the five cDE models the
cumulative probabilities increase compared to the \Lambda CDM case and that in
the model with exponential coupling P(V_{c}>=2500 km/s) exceeds 10^{-4}. The
physical interpretations and cosmological implications of our results are
provided.
